( ESNUG 433 Item 9 ) -------------------------------------------- [10/20/04]
From: Michael Burns <michael.burns=user domain=freescale spot calm>
Subject: User Warns That Stand-Alone Vera & Synopsys NTB Have Differences!
Hi, John,
This is from our migration from stand-alone Vera to NTB, Native Testbench,
Synopsys' re-implementation of the OpenVera language natively in VCS).
Here at Freescale, we've been using stand-alone Vera (i.e. simulating
with the Vera interpreter running alongside VCS) for long enough to
develop a bunch of VIP that we'd like to keep using. However, we'd
also like to take advantage of the performance gains promised from
migrating our stand-alone Vera code to NTB. We've found, at least
internally, that occasionally there's some confusion about what exactly
a migration to Synopsys NTB entails. My message to your readers is to
clarify that while NTB covers the vast majority of the OpenVera language,
it does not support 100% of the code that stand-alone Vera does.
One of our engineers made a good analogy that migrating from Vera
to NTB is similar to migrating from Verilog-XL to VCS - the language is
"the same" for the most part, but there are a few constructs that need
to be re-coded and some validation work needs to be done after migration
to make sure the intended functionality has been preserved.
- Michael Burns
Freescale Semiconductors
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